C316 Pernicious incorruptio

The three of us sat down in the living room. Fei Sanniang told me that in order to prevent Zhang Rukun from dying in front of the Yang family, he had restricted the duration of the Life Snake Gu to six hours.

I have heard of Gu Masters being able to control Gu poison's duration, for example there are Gu Nai who can control it if they are worried about it being discovered